Remove redundant Typ.struct_typ.csu field

Summary:
The Typ.struct_typ.csu field is now redundant with the Csu.t in the
name: Typename.t field.

Reviewed By: cristianoc

Differential Revision: D3791861

fbshipit-source-id: 5370885

infer/src/IR/Typ.re

@@ -286,7 +286,6 @@ and struct_typ = {
   name: Typename.t, /** name */
   instance_fields: struct_fields, /** non-static fields */
   static_fields: struct_fields, /** static fields */
-  csu: Csu.t, /** class/struct/union */
   superclasses: list Typename.t, /** list of superclasses */
   def_methods: list Procname.t, /** methods defined */
   struct_annotations: item_annotation /** annotations */
@@ -306,18 +305,15 @@ let rec fld_typ_ann_compare fta1 fta2 =>
   triple_compare Ident.fieldname_compare compare item_annotation_compare fta1 fta2
 and fld_typ_ann_list_compare ftal1 ftal2 => IList.compare fld_typ_ann_compare ftal1 ftal2
 and struct_typ_compare struct_typ1 struct_typ2 =>
-  if (struct_typ1.csu == Csu.Class Csu.Java && struct_typ2.csu == Csu.Class Csu.Java) {
+  switch (struct_typ1.name, struct_typ2.name) {
+  | (TN_csu (Class Java) _, TN_csu (Class Java) _) =>
     Typename.compare struct_typ1.name struct_typ2.name
-  } else {
+  | _ =>
     let n = fld_typ_ann_list_compare struct_typ1.instance_fields struct_typ2.instance_fields;
     if (n != 0) {
       n
     } else {
       let n = fld_typ_ann_list_compare struct_typ1.static_fields struct_typ2.static_fields;
-      if (n != 0) {
-        n
-      } else {
-        let n = Csu.compare struct_typ1.csu struct_typ2.csu;
       if (n != 0) {
         n
       } else {
@@ -325,7 +321,6 @@ and struct_typ_compare struct_typ1 struct_typ2 =>
       }
     }
   }
-  }
 /** Comparision for types. */
 and compare t1 t2 =>
   if (t1 === t2) {
@@ -367,13 +362,12 @@ let struct_typ_equal struct_typ1 struct_typ2 => struct_typ_compare struct_typ1 s
 
 let equal t1 t2 => compare t1 t2 == 0;
 
-let rec pp_struct_typ pe pp_base f {csu, instance_fields, name} =>
+let rec pp_struct_typ pe pp_base f {instance_fields, name} =>
   if false {
     /* change false to true to print the details of struct */
     F.fprintf
       f
-      "%s %a {%a} %a"
-      (Csu.name csu)
+      "%a {%a} %a"
       Typename.pp
       name
       (pp_seq (fun f (fld, t, _) => F.fprintf f "%a %a" (pp_full pe) t Ident.pp_fieldname fld))
@@ -534,8 +528,8 @@ let get_field_type_and_annotation fn =>
 
 /** if [struct_typ] is a class, return its class kind (Java, CPP, or Obj-C) */
 let struct_typ_get_class_kind struct_typ =>
-  switch struct_typ.csu {
-  | Csu.Class class_kind => Some class_kind
+  switch struct_typ.name {
+  | TN_csu (Class class_kind) _ => Some class_kind
   | _ => None
   };
 
@@ -565,7 +559,7 @@ let struct_typ_is_objc_class struct_typ =>
 
 let is_class_of_kind typ ck =>
   switch typ {
-  | Tstruct {csu: Csu.Class ck'} => ck == ck'
+  | Tstruct {name: TN_csu (Class ck') _} => ck == ck'
   | _ => false
   };
 

infer/src/IR/Typ.rei

@@ -141,7 +141,6 @@ and struct_typ = {
   name: Typename.t, /** name */
   instance_fields: struct_fields, /** non-static fields */
   static_fields: struct_fields, /** static fields */
-  csu: Csu.t, /** class/struct/union */
   superclasses: list Typename.t, /** list of superclasses */
   def_methods: list Procname.t, /** methods defined */
   struct_annotations: item_annotation /** annotations */

infer/src/backend/localise.ml

@@ -685,7 +685,7 @@ let desc_leak hpred_type_opt value_str_opt resource_opt resource_action_opt loc
           s, " to ", " on " in
     let typ_str =
       match hpred_type_opt with
-      | Some (Exp.Sizeof (Tstruct { csu = Class _; name; }, _, _)) ->
+      | Some (Exp.Sizeof (Tstruct { name = TN_csu (Class _, _) as name; }, _, _)) ->
           " of type " ^ Typename.name name ^ " "
       | _ -> " " in
     let desc_str =

infer/src/backend/modelBuiltins.ml

@@ -760,7 +760,7 @@ let execute_alloc mk can_return_null
         evaluate_char_sizeof (Exp.Const (Const.Cint len))
     | Exp.Sizeof _ -> e in
   let size_exp, procname = match args with
-    | [(Exp.Sizeof (Tstruct { csu = Class Objc; name } as s, len, subt), _)] ->
+    | [(Exp.Sizeof (Tstruct { name = TN_csu (Class Objc, _) as name } as s, len, subt), _)] ->
         let struct_type =
           match AttributesTable.get_correct_type_from_objc_class_name name with
           | Some struct_type -> struct_type

infer/src/backend/prover.ml

@@ -1476,7 +1476,6 @@ let expand_hpred_pointer calc_index_frame hpred : bool * bool * Sil.hpred =
                 (Tstruct
                    { instance_fields = [(fld, cnt_typ, Typ.item_annotation_empty)];
                      static_fields = [];
-                     csu = Struct;
                      name = TN_csu (Struct, Mangled.from_string "counterfeit");
                      superclasses = [];
                      def_methods = [];
@@ -1516,7 +1515,7 @@ struct
 
   let is_interface tenv class_name =
     match Tenv.lookup tenv class_name with
-    | Some ({ csu = Class Java } as struct_typ) ->
+    | Some ({ name = TN_csu (Class Java, _) } as struct_typ) ->
         (IList.length struct_typ.Typ.instance_fields = 0) &&
         (IList.length struct_typ.Typ.def_methods = 0)
     | _ -> false
@@ -1534,7 +1533,7 @@ struct
     let rec check cn =
       Typename.equal cn c2 || is_root_class c2 ||
       match Tenv.lookup tenv cn with
-      | Some ({ csu = Class _; superclasses }) ->
+      | Some ({ name = TN_csu (Class _, _); superclasses }) ->
           IList.exists check superclasses
       | _ -> false in
     check c1
@@ -1555,7 +1554,8 @@ struct
   (** check if t1 is a subtype of t2, in Java *)
   let rec check_subtype_java tenv t1 t2 =
     match t1, t2 with
-    | Typ.Tstruct { csu = Class Java; name = cn1 }, Typ.Tstruct { csu = Class Java; name = cn2 } ->
+    | Typ.Tstruct { name = TN_csu (Class Java, _) as cn1 },
+      Typ.Tstruct { name = TN_csu (Class Java, _) as cn2 } ->
         check_subclass tenv cn1 cn2
 
     | Typ.Tarray (dom_type1, _), Typ.Tarray (dom_type2, _) ->
@@ -1564,7 +1564,7 @@ struct
     | Typ.Tptr (dom_type1, _), Typ.Tptr (dom_type2, _) ->
         check_subtype_java tenv dom_type1 dom_type2
 
-    | Typ.Tarray _, Typ.Tstruct { Typ.csu = Csu.Class Csu.Java; name = cn2 } ->
+    | Typ.Tarray _, Typ.Tstruct { name = TN_csu (Class Java, _) as cn2 } ->
         Typename.equal cn2 serializable_type
         || Typename.equal cn2 cloneable_type
         || Typename.equal cn2 object_type
@@ -1587,7 +1587,8 @@ struct
 
   let rec case_analysis_type_java tenv (t1, st1) (t2, st2) =
     match t1, t2 with
-    | Typ.Tstruct { csu = Class Java; name = cn1 }, Typ.Tstruct { csu = Class Java; name = cn2 } ->
+    | Typ.Tstruct { name = TN_csu (Class Java, _) as cn1 },
+      Typ.Tstruct { name = TN_csu (Class Java, _) as cn2 } ->
         Subtype.case_analysis (cn1, st1) (cn2, st2)
           (check_subclass tenv) (is_interface tenv)
 
@@ -1597,7 +1598,7 @@ struct
     | Typ.Tptr (dom_type1, _), Typ.Tptr (dom_type2, _) ->
         case_analysis_type_java tenv (dom_type1, st1) (dom_type2, st2)
 
-    | Typ.Tstruct { Typ.csu = Csu.Class Csu.Java; name = cn1 }, Typ.Tarray _ ->
+    | Typ.Tstruct { name = TN_csu (Class Java, _) as cn1 }, Typ.Tarray _ ->
         if (Typename.equal cn1 serializable_type
             || Typename.equal cn1 cloneable_type
             || Typename.equal cn1 object_type) &&

infer/src/backend/symExec.ml

@@ -506,7 +506,7 @@ let resolve_method tenv class_name proc_name =
       let right_proc_name =
         Procname.replace_class proc_name (Typename.name class_name) in
       match Tenv.lookup tenv class_name with
-      | Some { Typ.csu = Csu.Class _; def_methods; superclasses } ->
+      | Some { name = TN_csu (Class _, _); def_methods; superclasses } ->
           if method_exists right_proc_name def_methods then
             Some right_proc_name
           else

infer/src/backend/tabulation.ml

@@ -467,8 +467,9 @@ let texp_star texp1 texp2 =
           | 0 -> ftal_sub ftal1' ftal2'
           | _ -> ftal_sub ftal1 ftal2' end in
   let typ_star t1 t2 = match t1, t2 with
-    | Typ.Tstruct { Typ.instance_fields = instance_fields1; csu = csu1 },
-      Typ.Tstruct { Typ.instance_fields = instance_fields2; csu = csu2 } when csu1 = csu2 ->
+    | Typ.Tstruct { instance_fields = instance_fields1; name = TN_csu (csu1, _) },
+      Typ.Tstruct { instance_fields = instance_fields2; name = TN_csu (csu2, _) }
+      when csu1 = csu2 ->
         if ftal_sub instance_fields1 instance_fields2 then t2 else t1
     | _ -> t1 in
   match texp1, texp2 with

infer/src/checkers/patternMatch.ml

@@ -35,7 +35,7 @@ let java_proc_name_with_class_method pn_java class_with_path method_name =
    with _ -> false)
 
 let get_direct_supers tenv = function
-  | { Typ.csu = Csu.Class _; superclasses } ->
+  | { Typ.name = TN_csu (Class _, _); superclasses } ->
       IList.map (Tenv.lookup tenv) superclasses
       |> IList.flatten_options
   | _ ->

infer/src/clang/cField_decl.ml

@@ -82,12 +82,10 @@ let add_missing_fields tenv class_name ck fields =
   match Tenv.lookup tenv class_tn_name with
   | Some ({ Typ.instance_fields } as struct_typ) ->
       let new_fields = General_utils.append_no_duplicates_fields instance_fields fields in
-      let class_type_info =
-        {
+      let class_type_info = {
         struct_typ with
-          Typ.instance_fields = new_fields;
+        instance_fields = new_fields;
         static_fields = [];
-          csu = Csu.Class ck;
         name = class_tn_name;
       } in
       Printing.log_out " Updating info for class '%s' in tenv\n" class_name;

infer/src/clang/cTrans.ml

@@ -130,7 +130,6 @@ struct
       {
         Typ.instance_fields = fields;
         static_fields = [];
-        csu = Csu.Class Csu.Objc;
         name = block_name;
         superclasses = [];
         def_methods = [];

infer/src/clang/cTypes_decl.ml

@@ -21,7 +21,6 @@ let add_predefined_objc_types tenv =
     {
       Typ.instance_fields = [];
       static_fields = [];
-      csu = Csu.Struct;
       name = TN_csu (Struct, Mangled.from_string CFrontend_config.objc_class);
       superclasses = [];
       def_methods = [];
@@ -33,7 +32,6 @@ let add_predefined_objc_types tenv =
     {
       Typ.instance_fields = [];
       static_fields = [];
-      csu = Csu.Struct;
       name = TN_csu (Struct, Mangled.from_string CFrontend_config.objc_object);
       superclasses = [];
       def_methods = [];
@@ -223,7 +221,6 @@ and get_record_declaration_struct_type tenv decl =
         let sil_type = Typ.Tstruct {
             Typ.instance_fields = non_static_fields;
             static_fields;
-            csu;
             name = sil_typename;
             superclasses;
             def_methods;
@@ -246,7 +243,6 @@ and get_record_declaration_struct_type tenv decl =
             let empty_struct_type = Typ.Tstruct {
                 Typ.instance_fields = extra_fields;
                 static_fields = [];
-                csu;
                 name = sil_typename;
                 superclasses = [];
                 def_methods = [];

infer/src/clang/objcCategory_decl.ml

@@ -81,12 +81,10 @@ let process_category type_ptr_to_sil_type tenv curr_class decl_info decl_list =
    | Some ({ Typ.instance_fields; def_methods } as struct_typ) ->
        let new_fields = General_utils.append_no_duplicates_fields fields instance_fields in
        let new_methods = General_utils.append_no_duplicates_methods methods def_methods in
-       let class_type_info =
-         {
+       let class_type_info = {
          struct_typ with
-           Typ.instance_fields = new_fields;
+         instance_fields = new_fields;
          static_fields = [];
-           csu = Csu.Class Csu.Objc;
          name = class_tn_name;
          def_methods = new_methods;
        } in

infer/src/clang/objcInterface_decl.ml

@@ -128,15 +128,13 @@ let add_class_to_tenv type_ptr_to_sil_type tenv curr_class decl_info name_info d
   Printing.log_out "Class %s field:\n" class_name;
   IList.iter (fun (fn, _, _) ->
       Printing.log_out "-----> field: '%s'\n" (Ident.fieldname_to_string fn)) all_fields;
-  let interface_type_info =
-    {
-      Typ.instance_fields = all_fields;
+  let interface_type_info = Typ.{
+      instance_fields = all_fields;
       static_fields = [];
-      csu = Csu.Class Csu.Objc;
       name = interface_name;
       superclasses;
       def_methods = methods;
-      struct_annotations = Typ.objc_class_annotation;
+      struct_annotations = objc_class_annotation;
     } in
   Tenv.add tenv interface_name interface_type_info;
   Printing.log_out
@@ -153,10 +151,7 @@ let add_missing_methods tenv class_name ck decl_info decl_list curr_class =
   Ast_utils.update_sil_types_map decl_key (Typ.Tvar class_tn_name);
   begin
     match Tenv.lookup tenv class_tn_name with
-    | Some ({ Typ.static_fields = [];
-              csu = Csu.Class _;
-              def_methods;
-            } as struct_typ) ->
+    | Some ({ static_fields = []; name = TN_csu (Class _, _); def_methods; } as struct_typ) ->
         let methods = General_utils.append_no_duplicates_methods def_methods methods in
         let struct_typ' = { struct_typ with Typ.def_methods = methods; } in
         Tenv.add tenv class_tn_name struct_typ'

infer/src/clang/objcProtocol_decl.ml

@@ -33,11 +33,9 @@ let protocol_decl type_ptr_to_sil_type tenv decl =
       let decl_key = `DeclPtr decl_info.Clang_ast_t.di_pointer in
       Ast_utils.update_sil_types_map decl_key (Typ.Tvar protocol_name);
       let def_methods = ObjcProperty_decl.get_methods curr_class decl_list in
-      let protocol_type_info =
-        {
-          Typ.instance_fields = [];
+      let protocol_type_info = Typ.{
+          instance_fields = [];
           static_fields = [];
-          csu = Csu.Protocol;
           name = protocol_name;
           superclasses = [];
           def_methods;

infer/src/eradicate/eradicateChecks.ml

@@ -135,7 +135,7 @@ let check_condition case_zero find_canonical_duplicate curr_pname
     let loc = Cfg.Node.get_loc node in
     let throwable_found = ref false in
     let typ_is_throwable = function
-      | Typ.Tstruct { csu = Class _; name } ->
+      | Typ.Tstruct { name = TN_csu (Class _, _) as name } ->
           string_equal (Typename.name name) "java.lang.Throwable"
       | _ -> false in
     let do_instr = function

infer/src/harness/androidFramework.ml

@@ -87,7 +87,7 @@ let is_android_lib_class class_name =
     a list of method names [lifecycle_procs_strs], get the appropriate typ and procnames *)
 let get_lifecycle_for_framework_typ_opt tenv lifecycle_typ lifecycle_proc_strs =
   match Tenv.lookup tenv (Typename.TN_csu (Csu.Class Csu.Java, lifecycle_typ)) with
-  | Some ({ Typ.csu = Csu.Class _; def_methods } as lifecycle_typ) ->
+  | Some ({ name = TN_csu (Class _, _); def_methods } as lifecycle_typ) ->
       (* TODO (t4645631): collect the procedures for which is_java is returning false *)
       let lookup_proc lifecycle_proc =
         IList.find (fun decl_proc ->

infer/src/harness/harness.ml

@@ -18,7 +18,7 @@ module F = Format
     constituting a lifecycle trace *)
 let try_create_lifecycle_trace struct_typ lifecycle_struct_typ lifecycle_procs tenv =
   match struct_typ with
-  | { Typ.csu = Class Java; name } ->
+  | { Typ.name = TN_csu (Class Java, _) as name } ->
       if PatternMatch.is_subtype tenv struct_typ lifecycle_struct_typ &&
          not (AndroidFramework.is_android_lib_class name) then
         let ptr_to_struct_typ = Some (Typ.Tptr (Tstruct struct_typ, Pk_pointer)) in

infer/src/harness/inhabit.ml

@@ -95,7 +95,7 @@ let rec inhabit_typ typ cfg env =
           (* select methods that are constructors and won't force us into infinite recursion because
            * we are already inhabiting one of their argument types *)
           let get_all_suitable_constructors typ = match typ with
-            | Typ.Tstruct { Typ.csu = Csu.Class _; def_methods } ->
+            | Typ.Tstruct { name = TN_csu (Class _, _); def_methods } ->
                 let is_suitable_constructor p =
                   let try_get_non_receiver_formals p =
                     get_non_receiver_formals (formals_from_name cfg p) in

infer/src/java/jTrans.ml

@@ -108,7 +108,7 @@ let retrieve_fieldname fieldname =
 
 let get_field_name program static tenv cn fs =
   match JTransType.get_class_type_no_pointer program tenv cn with
-  | Typ.Tstruct { Typ.instance_fields; static_fields; csu = Csu.Class _ } ->
+  | Typ.Tstruct { Typ.instance_fields; static_fields; name = TN_csu (Class _, _) } ->
       let fieldname, _, _ =
         try
           IList.find

infer/src/java/jTransType.ml

@@ -88,7 +88,7 @@ let rec create_array_type typ dim =
 
 let extract_cn_no_obj typ =
   match typ with
-  | Typ.Tptr (Tstruct { csu = Class _; name }, Pk_pointer) ->
+  | Typ.Tptr (Tstruct { name = TN_csu (Class _, _) as name }, Pk_pointer) ->
       let class_name = Typename.name name in
       if class_name = JConfig.object_cl then None
       else
@@ -238,7 +238,6 @@ let dummy_type cn =
   Typ.Tstruct {
     Typ.instance_fields = [];
     static_fields = [];
-    csu = Csu.Class Csu.Java;
     name = Typename.Java.from_string (JBasics.cn_name cn);
     superclasses = [];
     def_methods = [];
@@ -339,7 +338,6 @@ and create_sil_type program tenv cn =
       Typ.Tstruct {
         Typ.instance_fields;
         static_fields;
-        csu = Csu.Class Csu.Java;
         name = Typename.Java.from_string (JBasics.cn_name cn);
         superclasses;
         def_methods;